Charles e



(No Model.)

O. E. HART.-

PINTLE FOR BLIND HINGES AND PROCESS OF MAKING SAME.

Patented Aug. 14, 1894.

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UNITED STATES PATENT OFFICE.

CHARLES E. HART, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE 4 STANLEYWORKS, OF SAME PLACE.

PINTLE FOR BLIND-HINGES AND PROCESS OF MAKING SAME.

SPECIFICATION forming part of Letters Patent No. 524,483, dated August14, 1894:.

7 Application filed June 19, 1894. Serial No. 515,008. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES E. HART, a citi zen of the United States,residing at New Britain, in'the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inPintles for Blind- Hinges and Processes of Making the Same, of which thefollowing is a full, clear, and exact description, whereby anyoneskilled in the art can make and use the same.

My invention relates to the general class of devices on which a blind isadapted to be supported in aswinging position and in the process ofmaking the same, and the object of my invention is to provide a deviceof this class that shall embody the qualities of cheap ness, lightnessand durability, and one that can be struck or stamped to shape fromsheet metal causing a great saving in cost of manufacture and increasingthe rapidity with which they may be constructed.

To this end my invention consists in the details of the several partsmaking up the device as a whole and in their combination as moreparticularly hereinafter described and pointed out in the claims.

Referring to the drawings: Figure 1 is a detail view of a blank fromwhich the pintle bracket is formed. Fig. 2 is a detail view showing thepintle blank, and the pintle formed to shape. Fig. 3 is adetail viewshowing the pintle bracket and pintle in relative position, just beforebeing finally compressed together. Fig. 4 is a side view of thecompleted pintle, and Fig. 5 isa view in cross section through thepintle.

In the accompanying drawings the letter a denotes a flat piece of metalcut to a proper size to adapt it to be bent or folded into shape to forma pintle bracket. The blank ahas a key socket a, formed in the substanceof the metal and preferably consisting of a rectangular opening near oneend as shown, and on opposite ends of the blank lugs a are formed whichare to form the specific fastening means by which the bracket may besecured to a base piece. The blank a with the socket a and lugs a ispreferably struck from sheet metal at one operation or it may be formedin a series of steps.

The letter 11 denotes the pintle blank from the size of the pintle tobelformed and the blank is then bent at the center to a V shape, asshown in Fig. 3 of the drawings, so that the ends when folded upon eachother shall meet the lugs on the opposite ends registering with eachother. A pintle blank I), struck or stamped to shape as illustrated isby means of suitable dies bent into a substantially cylindrical form asshown in Fig. 2 with the key b projecting radially on one side of thecylinder. In the form described the pintle is shown as cylindrical inform and tubular,

such a construction afiording a light and strong structure. The pintle cwith the ke b is placed in the bend in the pintle bracket blank, asshown in Fig. 3 of the drawings, the key on the pintle being placedopposite the socket a in the pintle bracket. The ends of the pintlebracket blank are then closed down upon each other and the bracketwrapped closely about the pintle adjacent to the key as by means of diesunder pressure, the ends of the blank registering as described. In thisoperation the key I) on the pintle is forced into the socket a in thepintle bracket in such manner as to cause the parts to intermesh and toprevent the pintle from working loose in the bracket. In theconstruction described the open socket affords a space into which thekey is forced in the process of folding the parts together. A seriousobjection to prior forms of pintle brackets having cylindrical pintleswithout the key has been the difficulty experienced by the pintlesworking loose but such objection is entirely overcome by the meansdescribed in which the pintle is provided with a key which projectingfrom the pintle between the folds of the bracket affords a rigid braceeifectually preventing the pintle from working loose. The cylindricalform of pintle is the preferred form and the pintle may be eithertubular as described or formed in a more solid roll and of a slightlytapered shape if desired.

In the practice of my invention a cheap and durable pintle for blindhinges is provided preferable form for the blanks both for the pintleand the bracket and methods of forming them up and uniting them, but itis obvious that other means of constructing the parts may be employedand changes made in details ofthe shape of the blanks and of theengaging means without departing from the invention and by the exerciseof merely mechanical skill, and I do not limit myself to the specificshapes or proportions of the parts described, nor the precise method ofuniting them.

I claim as my invention- 1. A blind support including a cylindricalpintle formed to shape from a blank of sheet metal and having a keyprojecting from the pintle, and a pintle bracket wrapped about thepintle at .one end and provided with a socket-into which the keyprojects, and fastening means at the end of the bracket, allsubstantially as described.

2. In combination in a blind support, the cylindrical pintle formed froma sheet metal blank with a key projecting from the pintle near one end,a pintle bracket of sheet metal wrapped about the pintle near one endand having a socket in the bracket in which the key on the pintle islocated, fastening means on the end of the pintle bracket, and a basepiece to which the bracket is secured as by riveting, all substantiallyas described.

3. The process of constructinga blind pintle that includes first,forming a blank of sheet metal with lugs on the ends and a key socket inthe substance of the blank, second forming a blank for the pintle with aprojection on the blank for forming a key, third formingthe pintle blankto cylindrical shape with the key projection, fourth wrapping the sheetmetal blank forming the pintle bracket about the pintle and firmlycompressing the parts and causing'the forcible engagement of the key inthe socket, all substantially as described.

CHARLES E. HART.

Witnesses:

G. L. REYNOLDS, F. H. MARSH.

